Vacuum-cap.



C. HAMMER.

VACUUM CAP. APPLICATION FILED MAR- 3, I915- 0 1 R WW1. W5 4 M 2% W Wm SHm m M P f mmm.

' wi bnw oeoz C. HAMMER.

VACUUM CAP.

7 APPLICATION FILED MAB. 3,1915.

1 $80 020, Patented Sept. 24, 1918.

3 SHEETS-SHEET 3.

l I e e Qmnwboz A Was/Ami: HAMMER.

' jar.

CHARLES HAMMER, or QUEENS, ASSIGNMENTS, 'ro AMERICAN VACUUM-CAP.

Specification of Letters Patent.

Patented Sept. 24, 1918.

Application filed March 3, 1915. Serial No. 11,932.

To all whom it may concern Be it known that CHARLES HAMMER, a citizen ofthe United States, residing at ueens, Queens county, Long Island, New

York, has invented new and useful Improvement in Vacuum-Caps, of whichthe following is a specification.

The object of the present invention is to provide an improved form ofclosure for jars and similar vessels, whereby upon placing the closureon the jar top and subject ing it to a downward pressure on the portionextended beyond the outer wall of the jar, the closure flange will bebodily moved both downwardly and inwardly, while the portion of theclosure above the top edge of the jar will have a slight outward anddownward movement over the edge of the jar;

'which operation, efi'ected by drawing means,

will draw'upwardly about the edge of the central portion of the closure.Consequently, the area of the -central portion which is consideredbeneath the plane of the top of the closure will also be lessened.

In the accompanying drawings illustrating embodiments of my inventionFigure 1 is a-fragmentary partial sectionalview of the cap beforeapplication of the sealing ring. Fig. 2 is a similar view showing'thering as first applied. Fig. '3 is a similar view with the sealing ringapplied and the cap in condition ready for application. Fig. 4 is a viewof the cap as shown in Fig. 3,- as placed loosely on a jar. Fig. 5 showsthe closure as applied to the jar, in the sealed position. Fig. 6 showsa modification with the bead on the jar edge rolled outwardly. Figs. 7and 8 show a form of chuck device for applying the closure to, thdjar.Fig. 9 shows a modified form of the closure, as first applied to a jar,and Fig. 10 shows the same in sealing position. Fig. 11 shows anotherform ofclosure with the central portion of more curvature, as firstapplied; and Fig. 12 shows the same in final sealing position on a Informing the cap of the present invention as set forth in Figs. 3, 4 and7, a sheet metal blank is formed into the shape shown in Fig. 1, havinga central portion 10 that iscomparatively fiat, from,which a portionextends upwardly as at 11, and is curved outwardly and downwardly toform an arch portion 12,l1aving a flange portion 13 and constituting akind of rim-groove. As

shown the outer wall 13 is extended outward to form a kind of shoulder14, terminating 1n a downwardly extending flange or rim 15, see Figs. 1and 2. A ring washer or gasket 16,- of suitable elastic or plastic com-POSltIOh is placed inside of the closure as ind cated in Fig. 2; andthereupon the rim 15 1s bent inwardly to form a kind of channel or beadon the inside, that incloses the lower or outer edge of the washer 16,as indlcated in Figs. 3 and 4.

The closure is so designed relative to the dimensions of the jar 21,that when placed thereon the top of the jar will engage the m ddleportion of the gasket as indicated in Flgs. 4 and 7 The closure havingbeen placed loosely on the jar, as indicated in Figs. 4 and 7, pressureis brought against the projecting head portion 18 of the closure andalso on the flange portion 13, in a vertlcally downward direction. Thiswill have the eflect of forcing the closure down upon the ar and willalso draw downwardly and mwardly on the flange and beaded portion of theclosure, as will be understood by comparing Fig. -5 with Figs. 3 and 4.Such drawing operation will cause the arch portion 12 to move outwardly,and also downwardly to a slight extent. The gasket or washer willthereby be compressed, and will assume the shape of the jar wall on itsinner face, and be very tightly compressed between the flange and theouter top wall of the iar 21. This compression will also have the eifectof forcing the gasket somewhat inwardly at the arch portion 12, wherebyit will be also compressed between the top of the jar and the archportion, as shown in Figs. 5 and 8. By comparison of Fig. 5 w th Fig. 4,it will be seen that the flange portlon 13, is somewhat lengthened orextended downwardly, which is the result of the drawing operationcausing a movement or flowing of the central portion of the 010- sure,inside of the arch portion 12 over the edge of the jar, such outwardslidin over the jar edge being facilitated by the exible washer. Theportion 10 will be drawn upwardly at its edge as the annular connectingportion 11 of the closure is moved outwardly over the edge of the jar.It will be understood that the closure is free from contact orengagement with the jar when placed thereon, as indicated in Flgs. 4 and7, and in Figs. 5 and 8 it will be observed that the chuck. For urgingthe pad yieldably downwardly, a coiled spring 30 is interposed betweenthe pad and chuck member, seating in opposing recesses in said parts,the recess 31 in the chuck member leading through a screw-threadedopening 33' by which the chuck may be mounted and the recess 32 havingan opening in its bottom, as shown. The chuck is provided with ashoulder portion at 19 in its inner wall, and below this the lower edgeof the chuck is preferably divergent or rounded as shown at 19. The padis provided with a comparatively shallow annular groove at 39, inside ofwhich the bottom of the pad is shown as slightly convex.

When the closure is placed upon the jar, it is brought to engage thechuck, and downward pressure is applied on the chuck, that will engagethe closure as indicated in Fig. 7. The flange portion 13, and thebeaded portion 18 are first engaged by the shoulder 19 of the chuck,that will force the closure down on the jar. Thereupon, the pad will becarried down against the central portion of the closure, whereupon thepad will yield and slide upwardly relative to the chuck. The pad willengage the closure first at the central portion, and then at the top ofthe arch portion 12 that will yieldand permit the flattening movement ofthe central portion, that will be drawn upwardly against the pad, thelatter being cut, away at 35 to provide the space 36 for such upwardmovement. The groove portion 39 of the pad will assist in forcing theflange portion downward, and in compressing the gasket against the topwall of the jar as indicated in Fig. 8.

It will be observed from Figs. 5 and 8 that the lower portion of theflange 13, and the bead portion 18 are caused to move both downwardlyand inwardly, as will be apparent by comparing Fig. 5 with Fig. 4:. Thewasher 16 is forced upwardly somewhat to lie between the arch portion 12and the top of the jar. The washer will assume a somewhat convergentform tapering upwardly from the lower edge; but it will be seen that thewasher entirely separates the closure. from the jar and preventscontacting of the closure and the ar at all points.

By reason of the special bending operation of the die, the portion ofthe closure adjacent the flange will be caused to move or flow outwardlyand thus provide metal for the flange portion that is utilized in thedownward bending operation on the flange, whereby the outer portion ofthe flange is lengthened, as the central portion is made shallower, andthe distance between the central portion of the closure and the topplane of the closure is less in the sealed jar than in the closure priorto its application, as clearly shown in Figs. 1 and 5, this beingeffected in the drawing operation by the yieldable pad 24.

The modification shown in Figs. 9 and 10 is similar to that shown inFigs. 1 and 5, except that the sealing ring is so constructed that itcan seal only against the outer wall of the jar and not on the top wall.

In the modification shown in Figs. 11 and 12 the center of the closureis of greater depth and area, being curved upwardly at its edges to meetthe arch portion 12 with but a slightly deflected portion 11 as shown inFig. 3.

It will be understood that my form of closure as herein set forth,distinguishes from all others at present known or, in use, in that theprojecting flange of the closure is drawn downwardly and at the sametime forced inwardly by reason of the top portion of the closure and theinterior portion being caused to be drawn outwardly to furnish the metalwhereby the flange becomes ,lengthened to permit the downwardlymovement, and whereby the central portion of the closure is somewhatflattened by the sealing operation of the closure on the ar. I am awarethat heretofore jar closures have been sealed on jars by causing aninwardly bending of a depending flange member; but this has not beendone by drawing upwardly and outwardly on the ortion of the closureinside of the flange. y reason of the pad 24 being yieldable orresilient in its mounting the central portion of the closure ispermitted to move upwardly during the drawing operation, thus making thefinished or sealed closure shallower'than the unapplied closure, as isillustrated in both Figs. 5 and 12.

In the present invention the article itself, that is the closure only isclaimed ,the proc-. ess or method of applying this closureto a jarforming subject matter of a divislonal application.

' What I claim is: v

In combination with a jar having a substantially straight wall at thetop portion and a substantially'rounded top edge, ofa jar closurecomposed of reformable thin sheet metal comprising a dependingsubstantially concave central portion, and a deand inward with thecentral portion by an annular rounded arched portion considerably widerthan the jar edge, the said flange being extended outwardly and theninwardly at the lower portion to form a channel, and a com-' pressiblering washer secured in'said chan-' nel, and lining the inner wall of theflange to be compressed between the jar wall and flange portion of theclosure upon downward pressure on the said flange ex-" tension anddownward pressure on the central portion by a chuck member, whereby thesaid central portion will be drawn outwardly and the flange portiondownwardly and inwardly to reform the closure.

Inqtestimony whereof I have signed my name to this specification this29th day of December, 1914.

CHARLES HR.

